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Question about ADN8834

Question asked by HectorZhang on Apr 10, 2017
Latest reply on Apr 23, 2017 by HectorZhang

Hi,

I am using AND8834 for a TEC module, and I have two questions ( forgive my English, I am Chinese) :

1) Based on formulas given in DS, I have following conclusions:

     Vout2 = Vtempset - Z2 / Z1 ( Vout1 - Vtempset )

     Vtec = VLDR - VSFB = - 5 ( Vout2 - 1.25 )

    If Vtempset is not 1.25V, the output Vtec is not proportional to the error between Vtempset and Vout1 ( object temperature), then how could ADN8834 work?

2) If I reverse the temperature coefficient of Vout1 ( from positive to negative), and switch the VLDR ( tec+ ) and VSFB (tec-), Can AND8834 works normally ?

Thank you in advance.

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